I tested this with a simple text document using a .png image as the carrier. There was no way to tell from any standard inspection that there was a .txt file attached unless I used the unhide option in OP.
That is very cool and yet scary at the same time. Sure this has been around for some time, the ability to do this and even long prior to computers but still very cool. For sensitive information like software keys, etc... if you don't want someone finding out what they are, put em in a doc, hide it with OP using an image carrier or something else and there you go.
This has triple password options in case someone tries to break into it. While I admit, I have no real need to hide anything, it's still a very handy program, definitely a 5.
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